I could befriend you could befriend he could befriend we could befriend you could befriend they could befriend
V-ing form
I could be befriending you could be befriending he could be befriending we could be befriending you could be befriending they could be befriending
Perfect
I could have befriended you could have befriended he could have befriended we could have befriended you could have befriended they could have befriended
V-ing perfect
I could have been befriending you could have been befriending he could have been befriending we could have been befriending you could have been befriending they could have been befriending
Negation
Simple form
I couldn't befriend you couldn't befriend he couldn't befriend we couldn't befriend you couldn't befriend they couldn't befriend
V-ing form
I couldn't be befriending you couldn't be befriending he couldn't be befriending we couldn't be befriending you couldn't be befriending they couldn't be befriending
Perfect
I couldn't have befriended you couldn't have befriended he couldn't have befriended we couldn't have befriended you couldn't have befriended they couldn't have befriended
V-ing perfect
I couldn't have been befriending you couldn't have been befriending he couldn't have been befriending we couldn't have been befriending you couldn't have been befriending they couldn't have been befriending
Interrogative form
Simple form
could I befriend? could you befriend? could he befriend? could we befriend? could you befriend? could they befriend?
V-ing form
could I be befriending? could you be befriending? could he be befriending? could we be befriending? could you be befriending? could they be befriending?
Perfect
could I have befriended? could you have befriended? could he have befriended? could we have befriended? could you have befriended? could they have befriended?
V-ing perfect
could I have been befriending? could you have been befriending? could he have been befriending? could we have been befriending? could you have been befriending? could they have been befriending?
Interro-negative form
Simple form
couldn't I befriend? couldn't you befriend? couldn't he befriend? couldn't we befriend? couldn't you befriend? couldn't they befriend?
V-ing form
couldn't I be befriending? couldn't you be befriending? couldn't he be befriending? couldn't we be befriending? couldn't you be befriending? couldn't they be befriending?
Perfect
couldn't I have befriended? couldn't you have befriended? couldn't he have befriended? couldn't we have befriended? couldn't you have befriended? couldn't they have befriended?
V-ing perfect
couldn't I have been befriending? couldn't you have been befriending? couldn't he have been befriending? couldn't we have been befriending? couldn't you have been befriending? couldn't they have been befriending?